Python R&D Developer | Software Engineering Practice at MARGO

Who Are We?At MARGO, our consultants focus on what truly matters: tackling complex projects that combine intellectual challenges with real business impact. We partner with leading players in finance, industry, and tech to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large…

Join Theodo: Pioneers in Digital SolutionsSince 2009, Theodo has been at the forefront of innovation, helping businesses design, develop, and deploy ingenious digital products by leveraging the best technology and Lean methodologies.With exceptional growth over the past 15 years, Theodo now boasts a talented team of over 700 professionals, primarily composed of passionate Software Engineers dedicated to continuous improvement. Our growth has led to specialized entities within the group focusing on various technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Heathtech, Consumer Products). By 2025, Theodo aims to generate 100M€ in revenue.At Theodo FinTech, our mission is to enhance the usefulness of finance for individuals, businesses, and society. We partner with major corporations, ScaleUps, and StartUps within the financial services sector to design, develop, and maintain accessible, sustainable, and socially beneficial digital products.As experts in financial services technology, Theodo FinTech delivers exceptional digital products at lightning speed with zero bugs and high security. Our team excels at integrating APIs from all B2B fintech platforms to create innovative embedded finance solutions.Your Responsibilities:As a Senior Full-Stack Software Engineer at Theodo FinTech, your role will involve:- Rapidly coding without bugs, utilizing coding assistants (Copilot, Cursor, Windsurf).- Designing features by contributing product ideas and identifying optimal technical strategies, while adhering to our delivery practices.

Established in France and the United States, Gojob is at the forefront of AI-driven recruitment.Our Mission: To develop cutting-edge innovations that make the job market more fluid and accessible while assisting each individual with dignity.At Gojob, we believe in staffing instantly, at scale and with care.As a member of the French Tech 120 (FT120) since 2021 and recognized in the Next 40 in 2025, Gojob has been twice honored by the prestigious Financial Times ranking and received B Corp certification in 2023, continuing its ascent in the employment market.Our project is built upon three pillars:Innovation: Our 100% tech ecosystem, data infrastructure, and our AI “Aglaé” revolutionize recruitment processes and redefine individual support. From sourcing and matching to onboarding and training, technology permeates Gojob.Efficiency: We are committed to delivering concrete and transparent operational results: over 95% service rate and an average staffing time of just 24 minutes. For our “Gojobbers”, we offer unique support tailored to their professional journey, including financial services, online training, and 24/7 support.Impact: As a B-Corp and Social Economy Enterprise (ESS), our mission is embedded in our statutes, and we manage our activities with indicators related to our impact on the job market.Key Figures:- 80,000 recruitments for large groups and SMEs- 40% revenue growth in 2024- €25M invested in Research & Development- 2,000,000 applications processed by AI each year- 20,000 conversations managed by AI each week- 2,000,000,000 matching scores calculated by AI weekly

Join the Arago TeamArago is at the forefront of innovation in AI and computer hardware, dedicated to advancing technology and shaping the future. Our mission is to catalyze breakthroughs at the intersection of artificial intelligence and semiconductor technology.Established in 2024 by leading AI researchers and physicists specializing in photonics, electronics, software, mathematics, and machine learning, Arago consists of a dynamic team of engineers and scientists sourced from prestigious companies and research institutions around the globe.With a diverse team representing nine nationalities and operational hubs in France, North America, and Israel, we thrive on exceptional science and rapid progress. Our guiding principles include:Deliver Excellence: We take pride in the quality of our work.Agility: We prioritize speed and efficiency in our processes.Team Synergy: We foster a collaborative environment built on trust and respect.Our esteemed team is supported by executives from industry giants such as Apple, Arm, Nvidia, Microsoft, and Hugging Face, alongside influential deeptech venture capitalists and successful founders.

About UsAt MARGO, our consultants focus on what truly matters: complex projects that combine intellectual challenge with real business impact. We support leading players in finance, industry, and technology in designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, Practice Manager at MARGO for 5 years, and Prosper Gratian, Practice Lead and C++ Developer. Working alongside them provides unparalleled insight into the company, close mentorship for your development, and the opportunity to contribute to demanding IT projects with significant impact for our clients.Your ResponsibilitiesYou will engage in the development of a core application for the front office of an investment bank, a booking tool that provides positioning and performs real-time risk calculations. This tool is essential for the trading floor and other data consumers such as risk management, accounting, and back office. You will be involved in:- Developing new features to enhance performance and reduce latency.- Optimizing code to ensure peak performance, particularly in multithreading and latency management.- Collaborating with front office teams and other client departments.Technical Challenges: Performance, multithreading, and latency management.Rich Functional Environment: You will work in a rich functional environment, interacting with several key departments.Tech Stack: C++ 17

Join Talan as a Senior Manager specializing in Infrastructure Projects in Paris. In this pivotal role, you will lead high-impact projects, guiding teams to deliver innovative solutions that meet our clients' needs. Your expertise will drive operational excellence and ensure successful project outcomes.

Important: This position requires relocation to our Milan office.About SatispayAt Satispay, we are on a mission to transform daily payments into a seamless, equitable, and user-friendly experience. Our vision extends beyond payments; we aim to redefine the future of finance. As a dynamic movement, we empower millions to confront significant challenges with a shared purpose. And this is just the beginning.We pride ourselves on our ability to adapt swiftly, think innovatively, and foster an environment of mutual trust where challenging the status quo is encouraged. If you are seeking more than just another job and aspire to create a meaningful impact alongside a talented team, you have found the right place.Your RoleAs a Staff Software Engineer in our Consumer Wealth team, you will play a pivotal role in defining how our users cultivate and manage their savings and investments. You will be the principal technical authority for the Consumer sector, spearheading initiatives that enable millions to enhance their financial wellness through our innovative savings products and investment solutions.Your daily responsibilities will include:Define Technical Strategy: Formulate the technical strategy for the Consumer Wealth domain. Architect intricate subsystems that support savings and investment features with cross-product considerations, leading impactful initiatives across multiple teams.Advance the Architecture: Design and implement scalable, high-quality systems that address complex financial engineering challenges, streamlining sophisticated back-end systems for wealth management.Technical Thought Leadership: Cultivate cross-organizational partnerships to align technical visions, advocate for our technical agenda both internally and externally, and remain at the forefront of technological advancements in FinTech and wealth management.Develop Talent: Nurture the next generation of technical leaders and promote a culture of excellence in engineering and continuous improvement.Generate Impact: Contribute significantly to users' wealth growth and financial aspirations through your work on the Consumer Wealth back-end infrastructure, directly aligning with Satispay's mission.Prepare for challenges, collaboration, and the autonomy to bring your ideas to fruition. Our tech stack includes a diverse array of technologies, fostering an environment of innovation and creativity.

Discover Theodo’s Journey and SuccessSince 2009, Theodo has been empowering innovative companies by designing, developing, and deploying ingenious digital products, leveraging cutting-edge technology and Lean methodologies.With remarkable growth over the past 15 years, Theodo has expanded its team to over 700 passionate Theodoers, primarily Software Engineers dedicated to technology and continuous improvement. As we grow, we have structured into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Heathtech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.At Theodo FinTech, our mission is to make finance more beneficial for individuals, businesses, and society. As the FinTech expert within Theodo, we partner with clients — large enterprises, ScaleUps, and StartUps in the financial services sector — to design, develop, and maintain accessible, sustainable, and valuable digital products for society.As technology experts in financial services, Theodo FinTech delivers exceptional digital products in record time, ensuring zero bugs and high security. We excel at integrating APIs from all B2B FinTech platforms to create embedded finance solutions.Your Team:At Theodo, our tech teams operate in project groups tailored to each client’s needs. You will be part of a close-knit team of Theodoers (4 to 5 members), including Software Engineers, a Tech Lead, and a Product Manager. Together, you will work closely with the client, engaging in regular discussions to share progress, deepen understanding of their challenges, and evolve the product to meet user needs effectively.Your Future Responsibilities:As a Fullstack Software Engineer, you will be responsible for developing innovative solutions, collaborating with clients to refine specifications, and ensuring the delivery of high-quality software.

Join Voodoo as a Senior Software EngineerFounded in 2013, Voodoo is a dynamic technology company dedicated to crafting engaging mobile games and applications, aiming to entertain a global audience. With a team of 800 talented individuals, we proudly boast 7 billion downloads and over 200 million active users, making us the third-largest mobile publisher worldwide, following Google and Meta. Our diverse portfolio features chart-topping games like Mob Control and Block Jam, as well as popular applications such as BeReal and Wizz.The Engineering & Data team is at the heart of our innovation, developing advanced technology products and platforms that fuel the incredible growth of our gaming and consumer applications, ensuring Voodoo remains a leader in the mobile gaming industry.As a member of our Engineering team, you will work collaboratively within a dedicated squad of up to 10 members, providing an exceptional opportunity to innovate and achieve meaningful results from start to finish.Your RoleWe are seeking a Senior Software Engineer to enhance our Engineering & Data team. In this pivotal role, you will take complete responsibility for your domain, from solution design through to deployment, ensuring a fine balance between quality and efficiency.Design and develop business-oriented full-stack applications in a cutting-edge and evolving environment.Contribute to our innovative growth engine, scaling apps and games to reach millions of users.Engage in strategic discussions and consistently deliver creative solutions to business teams.Exemplify technical excellence and establish best practices—write code that sets a standard.Enhance team tools and champion improvement initiatives.Foster the growth of your teammates.Oversee features from architecture and implementation to deployment and monitoring.Utilize event-driven systems (SQS/SNS) to create robust, decoupled services.

About Theodo Healthtech Theodo Healthtech builds digital solutions for the healthcare sector from its Paris office. The team focuses on applying artificial intelligence to real-world healthcare challenges. Role Overview: AI-Native Software Engineer This position centers on designing, building, and refining AI-powered applications for healthcare. The AI-Native Software Engineer works closely with colleagues from various disciplines to create tools that support better patient outcomes and more efficient healthcare operations. What You Will Do Collaborate with cross-functional teams to develop AI-driven applications for healthcare Design, implement, and optimize software that supports patient care and streamlines processes What We Look For Solid background in software engineering Strong interest in artificial intelligence technologies Motivation to improve healthcare through technology This role is based in Paris.

Role Overview Quadient is looking for a Full Stack Software Engineer to join the Research & Development team in Paris. This position focuses on building and improving software that strengthens our product lineup and supports customer needs. Collaboration with colleagues from different specialties is a key part of the job. Main Responsibilities Design and develop scalable web applications. Work alongside UX/UI designers to shape user-friendly interfaces. Take part in code reviews and help uphold strong coding standards. Join Agile ceremonies and contribute to project planning and delivery.

Who are we?At MARGO, our consultants engage in what truly matters: complex projects that blend intellectual challenges with real business impact. We collaborate with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why join the Software Engineering Practice?You will be part of a newly established team led by Paul Blois, Practice Manager at MARGO for the past 5 years. Working alongside him means gaining in-depth knowledge of the company, receiving close guidance in your professional development, and contributing to demanding IT projects with significant impacts for our clients.Your missionsYou will join a newly formed team at a leader in the energy sector, tasked with designing an algorithmic trading platform dedicated to battery energy storage. This strategic project aims to stabilize the electrical grid by injecting energy during peak consumption.As a C# Developer, you will contribute to building a robust, scalable, and high-performance solution capable of managing assets across Europe and the United States.Your responsibilities include:- Trading Engine Development: Design the software components enabling algorithmic trading in Intraday markets.- Asset Optimization: Implement and run complex optimization models (considering weather, market prices, and consumption profiles).- Backtesting Platform: Develop a secure and efficient environment for traders to test and validate their algorithmic strategies.- Scalability & Evolvability: Participate in the architecture of a solution initially focused on batteries but eventually designed to integrate the entire renewable energy portfolio (wind, hydro, thermal).

Join Waniwani as a Founding Platform Engineer and revolutionize our infrastructure for seamless scalability.We have pioneered the first insurance application integrated with ChatGPT. Today, numerous companies are eager to leverage our platform to establish their own AI-driven storefronts. Each client requires a dedicated MCP server, a unique codebase, and tailored distribution, all functioning seamlessly and interconnected under your management.About WaniwaniWaniwani is at the forefront of creating the AI distribution framework for the $10 trillion services economy. Our platform empowers businesses to offer quote-based services such as insurance and wealth management directly within LLMs, where consumer purchasing decisions are increasingly shifting. Imagine Shopify, but tailored for services — we are constructing the foundation for AI-native commerce.We are just beginning this transformative journey. Our launch of ChatGPT insurance resulted in a staggering $26 billion in market cap losses for major brokers within just 48 hours, marking what the press has dubbed "the industry's ChatGPT moment." We refer to it as Day 1.Why This Position MattersHaving surpassed the proof of concept stage, our product is operational. We are now tasked with managing this for hundreds of clients simultaneously, each with its own MCP server, distinct data pipelines, and customized distribution dashboards, all while ensuring the platform remains robust and responsive.This role presents a systems-level engineering challenge. You will be responsible for architecting a solution that allows Waniwani to expand from dozens to thousands of deployments. This includes multi-tenant infrastructure, orchestration of multiple codebases, and real-time data flow across a multitude of interconnected services. In this role, a single flawed abstraction can cost months, whereas a well-designed one can save years.We anticipate that AI will write 95% of your code. Your expertise will not lie in typing code but in discerning what needs to be built, how to structure it, and when the AI may be misguided. You will work at a pace that integrates LLMs as a fundamental aspect of your engineering process, rather than viewing them as a novelty. The key challenge will be exercising judgment, not merely keystrokes.

Join the innovative Ubisoft AI Initiatives team and help shape the future of information management within the gaming industry. We are at the forefront of developing advanced hybrid search systems and reasoning agents that transform raw data into rapid, informed decision-making tools. If you are passionate about enhancing human-AI collaboration to tackle intricate challenges, this is the perfect opportunity for you. We are on the lookout for a seasoned Senior Software Engineer to contribute to the creation of robust back-end systems that power our state-of-the-art AI applications.Key Responsibilities:Back-End Systems Development: Design and build scalable, high-performance back-end services that underpin AI solutions.Performance Optimization: Achieve low-latency and high-throughput operation for AI models, agents, and APIs, prioritizing speed and reliability.Cross-Team Collaboration: Work closely with data scientists and ML engineers to seamlessly integrate AI models and advanced agents into production environments, ensuring efficient deployment and monitoring.Cloud Infrastructure Management: Develop and sustain cloud-native solutions utilizing platforms such as AWS and Azure, focusing on scalability, security, and cost-effectiveness.Technical Leadership: Guide junior engineers, perform code reviews, and contribute to the team’s overarching technical strategy.Continuous Learning: Keep abreast of emerging trends and technologies in AI, cloud computing, and software engineering, and propose innovative ideas.As a Senior Software Engineer in AI Applications, you will have a unique opportunity to engage in leading-edge projects that influence the advancement of AI technologies. You will be able to:Participate in ongoing professional development to remain at the forefront of AI innovation.Assume greater responsibilities and influence the strategic development of our AI product offerings, driving significant innovations.

Your ImpactJoin us as a Senior Software Engineer in our Patient domain. Your mission is to revolutionize the Doctolib application into a comprehensive health companion powered by AI, enhancing patient health management with precision, empathy, and safety. You will collaborate within a feature team to develop an AI-driven chat interface designed to address health inquiries from patients and their loved ones.Being part of the Doctolib tech team means creating innovative products and features that significantly improve the daily lives of healthcare providers and patients alike.

Theodo: A Journey of Innovation and SuccessSince 2009, Theodo has been at the forefront of assisting innovative companies in the design, development, and deployment of ingenious digital products, leveraging cutting-edge technology and a Lean approach.Our unique approach is built on three core principles:- We have developed recognized expertise in key technologies for product design and development;- At every stage of the project, our primary focus is creating value for our clients;- We recruit top digital talent and nurture their ingenuity through our Lean approach.Theodo has experienced exceptional growth over the past 15 years: our teams comprise more than 700 Theodoers, primarily Software Engineers, who are passionate about technology and continuous improvement. As we have expanded, the group has structured itself into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.Your Team:You will join a tech community of over 120 Theodoers, including software engineers, tech leads, engineering managers, and architects, with whom you can exchange knowledge and grow daily.At Theodo, our tech teams work on project teams tailored to each client's needs. You will be part of a small team of Theodoers (4 to 5 people), consisting of Software Engineers, a Tech Lead, and a Product Manager. Together, you will collaborate closely with the client, regularly sharing progress, deepening your understanding of their challenges, and evolving the product to best meet the needs of its users.Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will be to design and develop useful, high-performing, and sustainable digital products to address the challenges faced by our clients and their users.

Discover Theodo's Journey and SuccessSince 2009, Theodo has been empowering innovative companies by designing, developing, and deploying ingenious digital products, leveraging cutting-edge technology and a Lean approach.Our unique methodology is built on three principles:- We have established recognized expertise in key product design and development technologies;- Regardless of the project phase, our priority in every decision is creating value for our clients;- We attract top digital talent and nurture their ingenuity through a Lean approach.Theodo has experienced exceptional growth over the last 15 years, with a team of over 700 dedicated professionals, primarily Software Engineers, passionate about technology and continuous improvement. As we grow, we have structured into specialized entities focused on technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to generate €100M in revenue.Your Team:You will join a community of over 120 Theodoers: software engineers, tech leads, engineering managers, and architects, with whom you will exchange ideas, learn, and grow on a daily basis.At Theodo, our tech teams work in project-based groups tailored to the specific needs of each client. You will be part of a small team (4 to 5 members) comprising Software Engineers, a Tech Lead, and a Product Manager. Together, you will collaborate closely with clients, regularly sharing progress, deepening understanding of their challenges, and evolving the product to meet user needs.Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will be to design and develop useful, high-performance, and sustainable digital products to address the challenges faced by our clients and their users.

Discover Theodo and Our Success StorySince 2009, Theodo has been a pioneering force in helping innovative companies design, develop, and launch ingenious digital products, leveraging cutting-edge technology and a Lean approach.Our unique approach is built on three key principles:- We have cultivated recognized expertise in essential product design and development technologies;- At every stage of a project, our priority is to create value for our clients;- We recruit the best digital talent and nurture their ingenuity through Lean methodologies.Theodo has experienced exceptional growth over the last 15 years: our teams consist of over 700 Theodoers, primarily Software Engineers passionate about technology and continuous improvement. With our growth, we have organized into specialized entities focusing on technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo is expected to generate €100M in revenue.Your Team:You will join a vibrant tech community of over 120 Theodoers: software engineers, tech leads, engineering managers, and architects, with whom you can exchange ideas, learn, and progress on a daily basis.At Theodo, our tech teams work in project groups tailored to meet each client's needs. You will be part of a small team of Theodoers (4 to 5 members), including Software Engineers, a Tech Lead, and a Product Manager. Together, you will collaborate closely with the client, engaging in regular discussions to share progress, deepen your understanding of their challenges, and adapt the product to meet user needs.Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will be to design and develop valuable, high-performing, and sustainable digital products that address the challenges faced by our clients and their users.

Join the Success Story of TheodoSince its inception in 2009, Theodo has been at the forefront of helping innovative businesses design, develop, and deploy ingenious digital products, leveraging cutting-edge technology and Lean methodologies.Our distinctive approach is anchored on three core principles:- We have honed recognized expertise in key product design and development technologies;- Regardless of the project stage, delivering value to our clients is our foremost priority in every decision;- We attract top digital talent and nurture their ingenuity through a Lean approach.Theodo has experienced remarkable growth over the past 15 years, bringing together more than 700 passionate Software Engineers dedicated to technology and continuous improvement. As we expand, we have structured our teams into specialized entities focused on technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to achieve €100M in revenue.You will become part of Theodo Extend, a newly formed entity within Theodo, designed to meet a growing market demand: many clients wish to retain control over product management while integrating top-tier developers into their teams.In 2024, we collaborated with over 100 clients, including Carrefour, Dior, and Yves Saint Laurent, with 63 experts dedicated to these projects.Your Mission:As a Software Engineer at Theodo Extend, you will be fully integrated into a client team while enjoying the support of our community of passionate engineers. You will receive training in best practices and ongoing guidance.You will work on tasks such as:- Revamping an existing codebase to ensure reliability, maintainability, and scalability through a complete migration to a modern stack.- Deploying a V1 in a matter of weeks, even in high-pressure contexts.

About UsHarmattan AI is at the forefront of defense technology, specializing in the development of autonomous and scalable defense systems. Following the successful completion of a $200 million Series B funding round, which has valued our company at $1.4 billion, we are actively expanding our teams and enhancing our capabilities to deliver mission-critical solutions to allied forces.We are driven by our core values: creating technologies with meaningful impact, striving for excellence in all our endeavors, setting ambitious goals, and tackling the most challenging technical problems. Our work environment is dynamic and demanding, where rigor, accountability, and execution are paramount.About the RoleAs an Automation Software Engineer, you will be instrumental in designing and developing the software that powers our automated testing and inspection platforms. Within the R&D department, you will develop robust and scalable automation tools that enhance both product development and manufacturing processes. Your primary focus will be on software development for test automation, while also engaging in the integration of mechanical and electrical components of test systems.